<template>
  <el-form label-width="100px">
    <el-form-item label="SPU名称">
      <el-input
        placeholder="请你输入SPU的名称"
        v-model="SpuParams.spuName"
      ></el-input>
    </el-form-item>
    <el-form-item label="SPU品牌">
      <el-select v-model="SpuParams.tmId">
        <el-option
          v-for="item in AllTradeMark"
          :key="item.id"
          :label="item.tmName"
          :value="item.id"
        ></el-option>
      </el-select>
    </el-form-item>
    <el-form-item label="SPU描述">
      <el-input
        type="textarea"
        placeholder="请你输入SPU的描述"
        v-model="SpuParams.description"
      ></el-input>
    </el-form-item>
    <el-form-item label="SPU图片">
      <!-- v-model:file-list->展示默认图片
           action:上传图片的接口地址
           list-type:文件列表的类型
       -->
      <el-upload
        v-model:file-list="imgList"
        action="/api/admin/product/fileUpload"
        list-type="picture-card"
        :on-preview="handlePictureCardPreview"
        :on-remove="handleRemove"
        :before-upload="handleBeforeUpload"
      >
        <el-icon><Plus /></el-icon>
      </el-upload>
      <el-dialog v-model="dialogVisible">
        <img
          w-full
          :src="dialogImageUrl"
          alt="Preview Image"
          style="width: 100%; height: 100%"
        />
      </el-dialog>
    </el-form-item>
    <el-form-item label="SPU销售属性">
      <!-- 展示销售属性的下拉菜单 -->
      <el-select
        style="width: 240px; margin-right: 10px"
        :placeholder="
          unSelectSaleAttr.length
            ? `还未选择${unSelectSaleAttr.length}个`
            : `无`
        "
        v-model="saleAttrIdAndValueName"
      >
        <el-option
          :value="`${item.id}:${item.name}`"
          v-for="item in unSelectSaleAttr"
          :key="item.id"
          :label="item.name"
        ></el-option>
      </el-select>
      <el-button
        :disabled="saleAttrIdAndValueName ? false : true"
        type="primary"
        size="default"
        icon="Plus"
        @click="addSaleAttr"
      >
        添加属性
      </el-button>
      <!-- table展示销售属性与属性值的地方 -->
      <el-table border style="margin: 10px 0" :data="saleAttr">
        <el-table-column
          label="序号"
          type="index"
          align="center"
          width="80px"
        ></el-table-column>
        <el-table-column
          label="销售属性名字"
          width="120px"
          prop="saleAttrName"
        ></el-table-column>
        <el-table-column label="销售属性值">
          <!-- row即为当前SPU已有的销售属性对象 -->
          <template #="{ row }">
            <el-tag
              v-for="(item, index) in row.spuSaleAttrValueList"
              :key="row.id"
              closable
              @close="row.spuSaleAttrValueList.splice(index, 1)"
            >
              {{ item.saleAttrValueName }}
            </el-tag>
            <el-input
              @blur="tolook(row)"
              v-model="row.saleAttrValue"
              v-if="row.flag == true"
              placeholder="请你输入属性值"
              size="small"
              style="width: 100px"
            ></el-input>
            <el-button
              v-else
              type="primary"
              size="small"
              icon="Plus"
              @click="toEdit(row)"
            ></el-button>
          </template>
        </el-table-column>
        <el-table-column label="操作" width="120px">
          <template #="{ $index }">
            <el-button
              type="primary"
              size="small"
              icon="Delete"
              @click="saleAttr.splice($index, 1)"
            ></el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-form-item>
    <el-form-item>
      <el-button
        :disabled="saleAttr.length > 0 ? false : true"
        type="primary"
        size="default"
        @click="save"
      >
        保存
      </el-button>
      <el-button type="primary" size="default" @click="cancel">取消</el-button>
    </el-form-item>
  </el-form>
</template>

<script setup lang="ts">
import { SpuData } from '@/api/product/spu/type'
//引入四个请求
import {
  reqAllTradeMark,
  reqSpuImageList,
  reqSpuHasSaleAttr,
  reqAllSaleAttr,
  reqAddOrUpdateSpu,
} from '@/api/product/spu'
import type {
  TradeMark,
  AllTradeMark,
  SpuImg,
  SpuHasImg,
  SaleAttr,
  SaleAttrResponseData,
  HasSaleAttr,
  HasSaleAttrResponseData,
  SaleAttrValue,
} from '@/api/product/spu/type'
import { ref, computed } from 'vue'
import { ElMessage } from 'element-plus'

let $emit = defineEmits(['changeScene'])
//点击取消按钮:通知父组件切换场景为1,展示已有的SPU的数据
const cancel = () => {
  $emit('changeScene', { flag: 0, params: 'update' })
}

//存储数据的变量
//存储已有的SPU这些数据
let AllTradeMark = ref<TradeMark[]>([])
//商品的图片
let imgList = ref<SpuImg[]>([])
//已有的SPU销售属性
let saleAttr = ref<SaleAttr[]>([])
//全部的销售属性
let allSaleAttr = ref<HasSaleAttr[]>([])

//控制对话框的显示与隐藏效果
let dialogVisible = ref<boolean>(false)
//存储预览图片的地址
let dialogImageUrl = ref<string>('')

//将来收集还未选择的销售属性的ID与属性值的名字
let saleAttrIdAndValueName = ref<string>('')

//存储父组件传过来的已有的SPU对象
let SpuParams = ref<SpuData>({
  spuName: '', //新增或者修改的SPU的名字
  description: '', //新增或修改的SPU的描述
  category3Id: '', //收集的三级分类的ID
  tmId: '', //品牌ID
  spuSaleAttrList: [], //销售属性
  spuImageList: [],
})

//子组件书写一个方法
const initHasSpuData = async (spu: SpuData) => {
  //存储已有的SPU对象，将来在模板中展示
  SpuParams.value = spu
  //spu:即为父组件传递过来的已有的SPU对象，但是不完整
  //获取全部的品牌的数据
  let result: AllTradeMark = await reqAllTradeMark()
  //获取某一个品牌旗下的全部售卖商品的图片
  let result1: SpuHasImg = await reqSpuImageList(spu.id as number)
  // 获取已有的SPU销售属性的数据
  let result2: SaleAttrResponseData = await reqSpuHasSaleAttr(spu.id as number)
  // 获取整个项目全部SPU的销售属性
  let result3: HasSaleAttrResponseData = await reqAllSaleAttr()

  //存储全部品牌的数据
  AllTradeMark.value = result.data
  //SPU对应的商品图片
  imgList.value = result1.data.map((item) => {
    return {
      name: item.imgName,
      url: item.imgUrl,
    }
  })
  //存储已有的SPU的销售属性
  saleAttr.value = result2.data
  //存储全部的销售属性
  allSaleAttr.value = result3.data
}

//照片墙点击预览按钮的时候出发的钩子
const handlePictureCardPreview = (flie: any) => {
  dialogImageUrl.value = flie.url
  //显示对话框
  dialogVisible.value = true
}

//照片墙删除文件的钩子
const handleRemove = () => {
  console.log('删除了')
}

//照片上传之前对上传的文件进行约束调用的回调
const handleBeforeUpload = (file: any) => {
  if (
    file.type == 'image/png' ||
    file.type == 'image/jpeg' ||
    file.type == 'image/gif'
  ) {
    if (file.size / 1024 / 1024 < 3) {
      return true
    } else {
      ElMessage({
        type: 'error',
        message: '上传的文件大小务必小于3M',
      })
      return false
    }
  } else {
    ElMessage({
      type: 'error',
      message: '上传的文件类型务必为png|jpeg|gif',
    })
    return false
  }
}

//计算出当前SPU还未拥有的销售属性
let unSelectSaleAttr = computed(() => {
  let unSelectArr = allSaleAttr.value.filter((item) => {
    return saleAttr.value.every((item1) => {
      return item.name != item1.saleAttrName
    })
  })
  return unSelectArr
})

//添加销售属性的方法
const addSaleAttr = () => {
  // baseSaleAttrId: number
  // saleAttrName: string
  // spuSaleAttrValueList: spuSaleAttrValueList
  const [baseSaleAttrId, saleAttrName] = saleAttrIdAndValueName.value.split(':')
  let newSaleAttr: SaleAttr = {
    baseSaleAttrId,
    saleAttrName,
    spuSaleAttrValueList: [],
  }
  //追加到数组当中
  saleAttr.value.push(newSaleAttr)
  //清空收集的数据
  saleAttrIdAndValueName.value = ''
}

//添加属性值按钮的点击回调
const toEdit = (row: SaleAttr) => {
  //点击按钮的时候，input组件显示，变成编辑模式
  row.flag = true
  row.saleAttrValue = ''
}

//表单元素失去焦点的事件回调
const tolook = (row: SaleAttr) => {
  //整理收集到的属性的ID与属性值的名字
  const { baseSaleAttrId, saleAttrValue } = row
  // 整理成服务器需要的属性值形式
  let newSaleValue: SaleAttrValue = {
    baseSaleAttrId,
    saleAttrValueName: saleAttrValue as string,
  }
  //非法情况判断
  if ((saleAttrValue as string).trim() == '') {
    ElMessage({
      type: 'error',
      message: '属性值不能为空！！',
    })
  }

  //判断属性值是否重复
  let repeat = row.spuSaleAttrValueList.find((item) => {
    return item.saleAttrValueName == saleAttrValue
  })
  if (repeat) {
    ElMessage({
      type: 'error',
      message: '属性值重复',
    })
    return
  }

  // 追加新的属性值对象
  row.spuSaleAttrValueList.push(newSaleValue)
  row.flag = false
}

//保存按钮的回调
const save = async () => {
  //整理参数
  //1. 照片墙的数据
  SpuParams.value.spuImageList = imgList.value.map((item: any) => {
    return {
      imgName: item.name,
      imgUrl: (item.response && item.response.data) || item.url,
    }
  })
  //2. 整理销售属性的数据
  SpuParams.value.spuSaleAttrList = saleAttr.value

  let result = await reqAddOrUpdateSpu(SpuParams.value)
  if (result.code == 200) {
    ElMessage({
      type: 'success',
      message: SpuParams.value.id ? '更新成功' : '添加成功',
    })
    //通知父组件切换场景为0
    $emit('changeScene', {
      flag: 0,
      params: SpuParams.value.id ? 'update' : 'add',
    })
  } else {
    ElMessage({
      type: 'error',
      message: SpuParams.value.id ? '更新失败' : '添加失败',
    })
  }
  //发请求：添加SPU|更新已有的SPU
  //成功
  //失败
}

//添加一个SPU初始化的请求方法
const initAddSpu = async (c3Id: number | string) => {
  //先对数据进行清空
  Object.assign(SpuParams.value, {
    id: '',
    spuName: '', //新增或者修改的SPU的名字
    description: '', //新增或修改的SPU的描述
    category3Id: '', //收集的三级分类的ID
    tmId: '', //品牌ID
    spuSaleAttrList: [], //销售属性
    spuImageList: [],
  })
  //清空照片
  imgList.value = []
  //清空销售属性
  saleAttr.value = []
  //清空下拉菜单收集到的数据
  saleAttrIdAndValueName.value = ''
  //存储三级分类ID
  SpuParams.value.category3Id = c3Id
  //获取全部品牌的数据
  let result: AllTradeMark = await reqAllTradeMark()
  let result1: HasSaleAttrResponseData = await reqAllSaleAttr()
  // 存储数据
  AllTradeMark.value = result.data
  allSaleAttr.value = result1.data
}

//对外暴露
defineExpose({ initHasSpuData, initAddSpu })
</script>

<style scoped></style>
